Need a code

What is the code for opening a website but with fitted dimensions?

Like

Code:

---

<a href="blah.php" target="_blank"></a>

---

What else would need to be included?

It would use Javascript I believe; I simply found this website by querying on google;

http://javascript.internet.com/gener...up-window.html

I hope the helped, and I'm sure Nets or some other memeber who is javascript inclined may post their code.